Hoisting-machine.



PATENTED OCT. 17, 1905.

R. W. BASOM.

HOISTING MACHINE.

APPLICATION rum) SEPT. 21. 1904.

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Witnesses} PATENTED OCT. 17, 1905.

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R. W. BASOM.

HOISTING MACHINE.

APPLICATION FILED SEPT 21 1904 Witnesses: g y

UNITED STATES PATENT OFFTCE.

HOISTlNG-MACHINE.

Specification of Letters Patent.

Patented Oct. 17, 1905.

Application filed September 21, 1904. Serial No. 225,888.

To atl whom, it may concern:

Be it known that I, RANsFoRD W. BAsoM, a citizen of the United States,residing at Gralena, in the county of Cherokee and State of Kansas, haveinvented a new and useful Hoisting-Machine, of which the following isaspecification.

This invention relates to hoisting-machines.

The object of the invention is to simplify the construction and renderthe machine more eflicient, to place the hoisting mechanism positivelyunder control of the operator, and to improve the brake mechanism of thedrum in such manner that with the output of comparatively small amountof energy the drum may be controlled and caused to run slowly, rapidly,and be positively checked or stopped when so desired.

With the above and other objects in view the invention consists in thenovel construction and combination of parts of a hoistingmachine, aswill be hereinafter fully described and claimed.

In the accompanying drawings, forming a part of this specification, andin which like characters of reference indicate corresponding parts,Figure 1 is aview in elevation, showing the manner of connecting theengine with the hoisting-drum. Fig. 2 is a view in vertical longitudinalsection through the hoistingdrum.

The engine shown in Fig. 1 is constructed and operated in the samemanner as that shown in a patent granted to me February 10, 1891, No.445,967.

The drive-shaft 8 of the machine carries at each end a pinion 28, oneonly being shown, which mesh with two gears 29 and 30, mounted upon ashaft 31, which is supported in suitable journals 32, carried bybrackets 33, mounted upon a base 34, upon which the engine is alsosupported. The gear 29 is of the ordinary construction; but gear 30carries on its inner side a disk 35, which may be either bolted to thegear, as shown in Fig. 2, or be cast integral therewith. The disk isprovided with a peripheral flange 36, upon which are bolted a series ofwooden blocks 37, the outer faces of which are beveled and whichconstitute the locking-face of a pair of clutch members, the othermember being formed by the flange 38 of one of the heads 39 of thewinding-drum 40, the other head 41 being of the same construction. Theinner face of the flange 38 is beveled opposite to that of the face 37,so that when the two are brought into contact with each other a positiveclutching action ensues, which will lock the drum upon the shaft andcause it to rotate therewith. The two clutch members 37 and 38 arenormally held separated by a coiled spring 42, which is mounted upon theshaft 31 between the head 39 and disk 35, as clearly shown in Fig. 2.

The spool consists of strips or staves, which are secured to theperiphery of the hubs 43 of the two heads.

The outer face of the flange 38 is provided with a peripheral channel44, in which is disposed a band-brake 45, one end of each of which issecured to the base 34 at 46 and the other end of one of which issecured to a lever 47 upon a shaft 47, supported upon the base. Thisshaft carries an arm 48 rigid therewith, and to which the end of theother brake-band is secured, as shown in Fig. 1. Each brakeband hassecured to its inner side a plurality of wooden blocks 49, which areadapted to bear against the inner wall of the groove, and

thus eifectively lock the drum against rotation without wearing the sameaway by friction.

Depending from the shaft 31 between the head 41 of the drum and thegear-wheel 29 are two arms 50 and 51, the said arms being held spacedfrom the head and the gear-wheel by washers 52. The arm 50 has aninternally-threaded head 53, which is engaged by a threaded extension54, projecting laterally from the arm 51. The arm 50 is held againstrotation by a rod 55, one end of which is connected with the lower endof the arm, as

shown in Fig. 3, and the free end of which projects through the rear endof the base and has loosely mounted thereon a washer 56, against whichbears a coiled spring 57, carried by the projecting end of the rod andheld in position thereon by a cotter-pin 58. The function of the springis to permit arm 50 to have a slight yielding movement to preventbreakage under strain. The arm 51 is mounted for rotation upon the shaftand has connected with it one end of a rod 59, the other end of which isconnected with a lever 60, pivoted upon the base and having aspringpressed latch 61 to engage with the teeth of the rack-bar 48 tohold the lever at any desired adjustment. The function of this lever isto rock the arm 51 and cause its threaded extension by engagement withthe head of the arm 50 to force the drum laterally upon the shaft 31 andagainst the stress of the spring 42, and thus cause the two clutchelements 37 and 38 to interlock and effect rotation of the drum. Thisarrangement is absolutely positive, and sufiicient pressure may beexerted upon the drum to cause the clutch members to be effective inholding the drum for driving under any desired strain, and immediatelyupon the lever 60 being shifted the spring 42 will automatically forcethe drum to its normal position, and thus release the clutches.

If preferred, a foot-lever 62 may be employed in lieu of the hand-levermechanism for operating the brake and which is mounted upon a shaft 63,supported by the base, the said shaft being provided with a shoe 64:,which when the foot-lever is depressed will engage with the band-brakeand cause the band-brake to engage the wall of the groove 49 withsufficient force to stop the rotation of the drum when the frictionalcontact between the clutch elements is comparatively light.

The arrangement of the brake mechanism and drum-shifting devices will befound thoroughly effective in use for the purposes designed and beingsimple of construction will not be liable to get out of repair fromlongcontinued use.

All the improvements herein described are of utility and will inapractical and thoroughly satisfactory manner perform the severalfunctions for which they are designed.

Having thus described the invention, what is claimed is 1. In a hoistingmachine, a shaft provided at each end with a gear-wheel, a clutchelement carried by one of the gears. a spool loosely mounted upon theshaft and carrying asecond clutch element, an arm loosely mounted uponthe shaft and having a threaded extension, a second arm engaging theextension, means to permit the latter arm to have a slight yieldingmovement, and means for oscillating the first-named arm to impartlateral movement to the drum.

2. A hoisting-machine comprising a shaft, a spool loosely mountedthereon and having a band-brake combined with each end thereof, a leverfor simultaneously operating both bands, a gear fixed to the shaft andcarrying a clutch element, a second clutch element combined with thespool, an arm loosely mounted on the shaft and having a threadedextension, an arm engaging at one end with the thread ed extension andhaving its other end held against oscillation, and means for vibratingthe first-named arm.

In testimony that I claim the foregoing as my own I have hereto aflixedmy signature in the presence of two witnesses.

RANSFORD W. BASOM.

Witnesses:

JOHN FITZGERALD, J. H. LENNON.

